Phonograph reproducer



May 5, 1925.

2 Sheets-Sheet 1 Filed Feb. 19r 1924 J. PAVEK PHONOGRAPH REPRODUGER May 5, 1925.

Filed Feb; 19, 1924 2 Sheets-Sheet 2 of which the following Patented May 5, 1925.

UNITED STATES 1,536,969 PATENT OFFICE.

JERRY PAVEK, OF CHICAGO, ILLINOIS.

PHONOGRAPE REPRODUCER.

To all whom it may concern:

Be it known that I, JERRY zen of the United States, go, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Phonograph Riproducer,

is a speci cation.

This invention relates to. improvements in sound reproducin construction.

The primary 0 je'ct of this invention is the provision of a relatively simple and PAVEK, a citieconomical type of reproducer which may be used upon phonographs or other sound reproducing mechanism as a means of reproducing sounds in a clear, loud tone. V

A further object of this invention is the provision of a sound reproducing'device embodyinga relatively large and simple type of diaphragm construction which is used'to cut records,

" of the following reproduce sound without the necessity of providing a sound amplifying horn or other sound box construction.

A further object of this invention is the provision of a sound reproducer embodying merely a diaphra construction which is fitted with stylus blding means adapted to conform the diaphra I11 construction for the reproduction of soun from vertical prlateral cut records; the same bein acutely sensitive and responsive to soun vibrations.

Other objects and advanta es of this invention will'be apparent during'the course detailed description.

In the accompanying drawings, forming a part of this specification, and wherein similar reference characters designate corresponding parts throughout the several views, v

Figure 1 is a side elevation of the improved reproducing mechanism showing the same in position for thevplaying ofvertical such as the Edison.

Figure 2 is a side elevation showing the improved 'reproducer in position for the playing of lateral cut records, such as manufactured by the Sonora and Victor talking machine companies.

Figure 3 is across sectional view taken through the diaphragm and stylus support ing construction of the improved reproducer. Figure 4 is a fragmentary cross sectional View taken through a supporting construction by which the improved reproducer-ma be universally used upon lateral and vertical cutrecords.

residing at Chica-' tions 17 and 18 of this disc diaph use in connection with the playing of talking machine records; the supporting construction B, of course, connecting the reproducer upon a phonograph C.

The reproducer A. includes a diaphragm construction 10 and stylus supporting means 11. The diaphra in construction 10 consists of the periphera y connected substantially conical shaped diaphragms 13 and 14 which are preferably. formed of some inherently stifi although resilient or yieldable material such as pyroxyline, cardboard, composition paper, fiber, or the like. As to the formation of these diaphragms 13 and 14, the same is of identical construction, and each of the same are formed of a substantially segmental piece of material 1 5, such as illustrated in Figure 5 of the, drawings. This segmental disc 15 ispreferably cut to provide a segment of less than 360 and greater than 270. In the formation of the diaphragms 13 and 14 the segment 15 is centrally bulged from a side thereof, and the facing ed e porare broug t Into meeting relation, and preferably overla and glued together to 'provide an imperfbrate ragm of conical shape. Incident to the glued overlapped edge portions 17 and 18 the diaphra will'hold its conical shape.

The diap ragms 13 and 14 after being conically formed as above mentioned are placed in peripherally en ga 'ng relation with the peripheral flanges 19 thereof in outwardly extending relation and in abutment; the. facing surfaces of these flanges 19 being glued together. The apices' of the diaphragms 13 and 14, of course, face in opposite directions,.andthus an enclosed sound reproducing compartment 25 is provided between the diaphragms 13 and 14.

7 Referring to the stylus means 11 of the reproducer, it is preferred to provide a stylus holder 30 centrally connected to the diaphragm 13, and, in

31 which is afiixed to the apex of the diaphragm 13 and extends over a considerable surface of said ,course, extends in the direction of the axis of the diaphragm construction 10, and may be provided with a suitable socket adapted to receive a stylus or needle 32 whiclr-may be clamped in the holder 30 by means of a set screw 33, as in ordinary construction. Adjacent and secured over the periphery of the diaphragm construction 10 is aibracket 35, which is of substantially Y-shaped formation,i providing spaced and relatively diverging\flange portion 36 and 37 adapted to receive therebetween a portion of the periphery of the diaphragms 13 and 14, so that said flanges respectively overlie the diaphragms I3 and 14 fora short distance. This bracket is of course secured in fixed relation to these diaphragms at the periphery of the construction 10, and it provides the spaced cars 38 radially extending outwardly from the peripheral portion .19 ofthe diaphragms; said -ears 38 being transversely apertured' in aligning relation to receive a tion therethrough. A stylus frame-arm 40 is preferably integrally connected to the central stylus holder 30 and extends in spaced relation along the diaphragm 13, and at its oppositeend is ofiset, at 41, as illustrated in Figure 3 of the drawings, and trans- 1 versely apertured; the a ertured portion being adapted to be received between the spaced ears or lugs 38 and to receive at the aperture thereof the pintle 39, by means of whichthis stylus frame arm 40 is pivotally connected to said pin or pintle39. Rigid with the arm ofi'set end 41 is a stylus holder 42, which provides a suitable sockettherein for receiving a stylus or needle 43,\yvhich may be clamped therein by means of the ordinary set screw 44. When the stylus arm 40 is pivoted to the pintle 39 the stylus 43 extends radially from the diaphragm struction 10', and it is used in playing records of the lateral cut type.

The means B for supporting the reproducer A upon the phonograph 0 preferably includes a bracket arm 50 having a sleeve 51 at one end thereof which receives therein sections 52 and 53 of a bracket which is secured to a wall 54 of the phonograph C so that the arm 50 may swing horizontally. An arm 55 of substantially Y-shaped or V-- shaped formation is provided, which includes the arm portions 56' and 57 at their free ends having Lsubstantially sockets 59 therein for receiving peripheral portions of the diaphra construction 10 in a fixed relation therein so that the arm 55 is substantially connected in a tangential relation to the reproducer A.

The arms 50 and 55 are preferably prointle or pin 39 in a detachable rela- Y-shaped vided at their free ends with a novel ball and socket construction by meansof which "the reproducer A may be universally piv= arm 55 has a ball 65 which is oscillativcly disposed in the socket 63. This ball 65 is preferably provided with openings 66 and 67 therein adapted to be positioned so that the shank end 62 of the set screw 61 may be inserted therein when the diaphragm construction is to be either positioned in a horizontal plane for playing vertical cut records, or positioned in a vertical plane for. playing lateral cut records. It is preferred that the socket segment 60 be provided with a forward extension 7 O which may receive 7 the arm portion 55 in a resting relation thereon intermediate its pivot socket 60 and the reproducer asa means of supporting the latter when not playing upon a record.

. Referring to the manner of operation of' the reproducer, when playing records of the vertical cut type, the reproducer A is positioned in a horizontal plane and the needle 32 engages in the groove ofthe record 1, substantially in the relation illustrated in Figure 1 of thedrawings. In this position the retaining screw 61 of the socket arm 50 is so positioned that the bearing end 62 is disposed in the openin 66 of the ball 65, so that the reproducer K may rise and fall in a vertical direction. The reproducer as it moves transversely across the record swings about the pivot provided by the bracket sections 52 and 53. It is apparent that the playing of this vertical cut type of record 71 will set the diaphragms 13 and 14 in vibration,incident to the direct connection of the stylus holder 30 with the central portion of the diaphragm 13.

In playing records of the lateral cut type 65 may be swung within its socket until the reproducer is positioned in a vertical plane and the needle of the stylus 43 may enter the groove of a record 72, substantially in the relation illustrated in Figure 2 of the drawings. In this position the retaining screw 61 at its bearing end enters the opening 67 of the ball 65, and the ball cannot then move within its socket except in a vertical direction, the reproducer being'free to swingacross the record incident to connection of the arm 50 with the bracket sections 52 and 53. In the playing of the lateral cut type of records it is important, that the stylus holder 42 is pivotally connected to the pin 39, since vibration of the stylus frame arm ma be transmitted to the central portion 0 the diaphragm 13, and the sound amplified in the diaphragm construction 10 accordingly.

From the foregoing description of this invention it. is apparent that a relatively simple type of reproducer has been provided which will supplant the expensive reproducing and sound amplifying horn now provided with phonographs. Especially is this so where it is the desire to provide an inexpensive phonograph construction. The diaphragm construction 10 may be made of any material as above described, and it is desired to make the stylus means 11 of metal, in order to transmit the vibration to the dia hragm for the reproduction of sound.

arious changes in the shape, size, and arrangement of parts may be made to the form of invention herein shown and described, without departing' from the spirit of this invention or the'scope of the claims.

I claim:

l. A reproducer comprising a pair of substantially conical shaped diaphragms each formed of a segmental sheet of material centrally bulged into a conical shape with the side edge portions of the same in meeting and secured relation, said diaphragms being peripherally connected to provide a closed compartment therebetween, and stylus means supported by said diaphragms.

2. In a reproducer a diaphragm construction consisting of a pair of segmental discs of inherently stiif although yieldable material responsive to vibrations, each of the same being centrally bulged by bringing the facing edges thereof into an overlapped and secured relation, and means peripherally securing the two diaphragms together with the apices thereof facing in opposite directions to provide an enclosed sound amplifying compartment therebetvveen,

As an article of manufacture a diaphragm construction for reproducers consisting of two similarly formed unperforated conical diaphragms outwardly flanged at their peripheries and glued together to provide an enclosed compartment therebetween.

4. In a device of the class described a diahragm construction consisting of a pair of conical diaphragms oppositely bulged to provide a compartment therebetween, and stylus holding means secured at the peripheral edge to said diaphragm construction in straddling relation to the conical diaphragms.

JERRY PAVEK. 

